All old race cars have awesome stories to tell, some more than others. The Double Trouble twin engine slingshot dragster has really been three cars in its life. The first was a hard running, Hemi powered Top Fueler. The second was an incredible Fuel car with twin Ford Indy Car motors. The third (and current) iteration as a twin small block Chevy powered machine capable of running into the 7s. We’ve got the video to prove it.
The 1971 version of the car, owned by Jim Busby, is the most famous. It ran at the 1971 Winternationals, and never saw the track again. Powered by two 300ci OHC Ford Indy engines on nitro, it ran in the low 8s and got so much attention it was awarded the “best engineered” award by Wally Parks himself.
Busby later became really famous as a road racer in the ’70s and ’80s, but for our drag obsessed selves, he’s a total hero for building the Indy engine version. Depending on who is telling the story, the car (with those two engines) was worth about $100,000 in early ’70s dollars (an insane amount for the time), or he bought the engines for about $3,000 each due to a rule change that rendered them useless. We like story two because it’s more our speed.
The whole history of the car is laid out in this great video filled with vintage photos and descriptions of the journey the car has taken over the last forty plus years.
That had to have an unreal sound with those twin Indy engines.
They used to call the headers on those engines a “bundle of snakes” and had a sound of it’s own. But the location of the headers between the heads made it impossible for racing in champ cars. At least one champ car owner switched heads around to put the headers on the outside. I don’t think that car was successful because I never heard much about it.
Introduced for the 1964 USAC season it was quite a successful engine producing 425HP on gas and no turbo, Ford made a deal with the car owners who used them. Buy the engine for $25,0000 and if you break it Ford would supply another for free but must be immediately returned and not taken apart. I believe that was only for the 1964 Indy 500 but could have been for the whole season. Ford lost interest in that engine around 1971-72 and sold everything to A.J. Foyt who renamed it “Foyt,” developed it further and in 1977 his fourth and final Indy win was with it. Foyt made racing history that day; he was the winning driver, he owned the car he was driving and it was powered by his engine.
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